Internet Explorer gives constant runtime errors

Hi,

I am continually getting Internet explorer run time errors as I surf.
Debug shows errors such as :
<1...ZoneLabs Popup Blocking Instruction..> <script language ='javascript>
postamble(); </script> (This appears to be in the explorer.exe file. Can you
edit it??)
another example is
line 333 undetermined string constant

Debug only runs on the first error and pressing "Yes to debg on subsequent
errors as they occur does not restart debug.
I would appreciate some help or directions as to trace and cure this problem.

I am runing EZFirewall and Vet but all was OK untill recently. Latest
version of Sun Microsystems Java loaded but problem still there.
Cheers S.J.B.
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S.J.B.